A class of portfolio optimization solvable problems

This short paper reveals the largest class of stochastic volatility processes solvable in closed form within expected utility theory for a hyperbolic absolute risk aversion investor. The risky-asset setting considers a framework outside the seminal work of Liu (2007), and highlights applications not yet studied in the literature. The work also demonstrates that analytical solutions for ambiguity-aversion analyses within the framework of Maenhout (2004) are feasible.